drivers/iommu/Kconfig

   1 # IOMMU_API always gets selected by whoever wants it.
   2 config IOMMU_API
   3         bool
   4
   5 menuconfig IOMMU_SUPPORT
   6         bool "IOMMU Hardware Support"
   7         default y
   8         ---help---
   9           Say Y here if you want to compile device drivers for IO Memory
  10           Management Units into the kernel. These devices usually allow to
  11           remap DMA requests and/or remap interrupts from other devices on the
  12           system.
  13
  14 if IOMMU_SUPPORT
  15
  16 config OF_IOMMU
  17        def_bool y
  18        depends on OF
  19
  20 config FSL_PAMU
  21         bool "Freescale IOMMU support"
  22         depends on PPC_E500MC
  23         select IOMMU_API
  24         select GENERIC_ALLOCATOR
  25         help
  26           Freescale PAMU support. PAMU is the IOMMU present on Freescale QorIQ platforms.
  27           PAMU can authorize memory access, remap the memory address, and remap I/O
  28           transaction types.
  29
  30 # MSM IOMMU support
  31 config MSM_IOMMU
  32         bool "MSM IOMMU Support"
  33         depends on ARCH_MSM8X60 || ARCH_MSM8960
  34         select IOMMU_API
  35         help
  36           Support for the IOMMUs found on certain Qualcomm SOCs.
  37           These IOMMUs allow virtualization of the address space used by most
  38           cores within the multimedia subsystem.
  39
  40           If unsure, say N here.
  41
  42 config IOMMU_PGTABLES_L2
  43         def_bool y
  44         depends on MSM_IOMMU && MMU && SMP && CPU_DCACHE_DISABLE=n
  45
  46 # AMD IOMMU support
  47 config AMD_IOMMU
  48         bool "AMD IOMMU support"
  49         select SWIOTLB
  50         select PCI_MSI
  51         select PCI_ATS
  52         select PCI_PRI
  53         select PCI_PASID
  54         select IOMMU_API
  55         depends on X86_64 && PCI && ACPI
  56         ---help---
  57           With this option you can enable support for AMD IOMMU hardware in
  58           your system. An IOMMU is a hardware component which provides
  59           remapping of DMA memory accesses from devices. With an AMD IOMMU you
  60           can isolate the DMA memory of different devices and protect the
  61           system from misbehaving device drivers or hardware.
  62
  63           You can find out if your system has an AMD IOMMU if you look into
  64           your BIOS for an option to enable it or if you have an IVRS ACPI
  65           table.
  66
  67 config AMD_IOMMU_STATS
  68         bool "Export AMD IOMMU statistics to debugfs"
  69         depends on AMD_IOMMU
  70         select DEBUG_FS
  71         ---help---
  72           This option enables code in the AMD IOMMU driver to collect various
  73           statistics about whats happening in the driver and exports that
  74           information to userspace via debugfs.
  75           If unsure, say N.
  76
  77 config AMD_IOMMU_V2
  78         tristate "AMD IOMMU Version 2 driver"
  79         depends on AMD_IOMMU && PROFILING
  80         select MMU_NOTIFIER
  81         ---help---
  82           This option enables support for the AMD IOMMUv2 features of the IOMMU
  83           hardware. Select this option if you want to use devices that support
  84           the PCI PRI and PASID interface.
  85
  86 # Intel IOMMU support
  87 config DMAR_TABLE
  88         bool
  89
  90 config INTEL_IOMMU
  91         bool "Support for Intel IOMMU using DMA Remapping Devices"
  92         depends on PCI_MSI && ACPI && (X86 || IA64_GENERIC)
  93         select IOMMU_API
  94         select DMAR_TABLE
  95         help
  96           DMA remapping (DMAR) devices support enables independent address
  97           translations for Direct Memory Access (DMA) from devices.
  98           These DMA remapping devices are reported via ACPI tables
  99           and include PCI device scope covered by these DMA
 100           remapping devices.
 101
 102 config INTEL_IOMMU_DEFAULT_ON
 103         def_bool y
 104         prompt "Enable Intel DMA Remapping Devices by default"
 105         depends on INTEL_IOMMU
 106         help
 107           Selecting this option will enable a DMAR device at boot time if
 108           one is found. If this option is not selected, DMAR support can
 109           be enabled by passing intel_iommu=on to the kernel.
 110
 111 config INTEL_IOMMU_BROKEN_GFX_WA
 112         bool "Workaround broken graphics drivers (going away soon)"
 113         depends on INTEL_IOMMU && BROKEN && X86
 114         ---help---
 115           Current Graphics drivers tend to use physical address
 116           for DMA and avoid using DMA APIs. Setting this config
 117           option permits the IOMMU driver to set a unity map for
 118           all the OS-visible memory. Hence the driver can continue
 119           to use physical addresses for DMA, at least until this
 120           option is removed in the 2.6.32 kernel.
 121
 122 config INTEL_IOMMU_FLOPPY_WA
 123         def_bool y
 124         depends on INTEL_IOMMU && X86
 125         ---help---
 126           Floppy disk drivers are known to bypass DMA API calls
 127           thereby failing to work when IOMMU is enabled. This
 128           workaround will setup a 1:1 mapping for the first
 129           16MiB to make floppy (an ISA device) work.
 130
 131 config IRQ_REMAP
 132         bool "Support for Interrupt Remapping"
 133         depends on X86_64 && X86_IO_APIC && PCI_MSI && ACPI
 134         select DMAR_TABLE
 135         ---help---
 136           Supports Interrupt remapping for IO-APIC and MSI devices.
 137           To use x2apic mode in the CPU's which support x2APIC enhancements or
 138           to support platforms with CPU's having > 8 bit APIC ID, say Y.
 139
 140 # OMAP IOMMU support
 141 config OMAP_IOMMU
 142         bool "OMAP IOMMU Support"
 143         depends on ARCH_OMAP2PLUS
 144         select IOMMU_API
 145
 146 config OMAP_IOVMM
 147         tristate "OMAP IO Virtual Memory Manager Support"
 148         depends on OMAP_IOMMU
 149
 150 config OMAP_IOMMU_DEBUG
 151        tristate "Export OMAP IOMMU/IOVMM internals in DebugFS"
 152        depends on OMAP_IOVMM && DEBUG_FS
 153        help
 154          Select this to see extensive information about
 155          the internal state of OMAP IOMMU/IOVMM in debugfs.
 156
 157          Say N unless you know you need this.
 158
 159 config TEGRA_IOMMU_GART
 160         bool "Tegra GART IOMMU Support"
 161         depends on ARCH_TEGRA_2x_SOC
 162         select IOMMU_API
 163         help
 164           Enables support for remapping discontiguous physical memory
 165           shared with the operating system into contiguous I/O virtual
 166           space through the GART (Graphics Address Relocation Table)
 167           hardware included on Tegra SoCs.
 168
 169 config TEGRA_IOMMU_SMMU
 170         bool "Tegra SMMU IOMMU Support"
 171         depends on ARCH_TEGRA && TEGRA_AHB
 172         select IOMMU_API
 173         help
 174           Enables support for remapping discontiguous physical memory
 175           shared with the operating system into contiguous I/O virtual
 176           space through the SMMU (System Memory Management Unit)
 177           hardware included on Tegra SoCs.
 178
 179 config EXYNOS_IOMMU
 180         bool "Exynos IOMMU Support"
 181         depends on ARCH_EXYNOS && EXYNOS_DEV_SYSMMU
 182         select IOMMU_API
 183         help
 184           Support for the IOMMU(System MMU) of Samsung Exynos application
 185           processor family. This enables H/W multimedia accellerators to see
 186           non-linear physical memory chunks as a linear memory in their
 187           address spaces
 188
 189           If unsure, say N here.
 190
 191 config EXYNOS_IOMMU_DEBUG
 192         bool "Debugging log for Exynos IOMMU"
 193         depends on EXYNOS_IOMMU
 194         help
 195           Select this to see the detailed log message that shows what
 196           happens in the IOMMU driver
 197
 198           Say N unless you need kernel log message for IOMMU debugging
 199
 200 config SHMOBILE_IPMMU
 201         bool
 202
 203 config SHMOBILE_IPMMU_TLB
 204         bool
 205
 206 config SHMOBILE_IOMMU
 207         bool "IOMMU for Renesas IPMMU/IPMMUI"
 208         default n
 209         depends on ARM
 210         select IOMMU_API
 211         select ARM_DMA_USE_IOMMU
 212         select SHMOBILE_IPMMU
 213         select SHMOBILE_IPMMU_TLB
 214         help
 215           Support for Renesas IPMMU/IPMMUI. This option enables
 216           remapping of DMA memory accesses from all of the IP blocks
 217           on the ICB.
 218
 219           Warning: Drivers (including userspace drivers of UIO
 220           devices) of the IP blocks on the ICB *must* use addresses
 221           allocated from the IPMMU (iova) for DMA with this option
 222           enabled.
 223
 224           If unsure, say N.
 225
 226 choice
 227         prompt "IPMMU/IPMMUI address space size"
 228         default SHMOBILE_IOMMU_ADDRSIZE_2048MB
 229         depends on SHMOBILE_IOMMU
 230         help
 231           This option sets IPMMU/IPMMUI address space size by
 232           adjusting the 1st level page table size. The page table size
 233           is calculated as follows:
 234
 235               page table size = number of page table entries * 4 bytes
 236               number of page table entries = address space size / 1 MiB
 237
 238           For example, when the address space size is 2048 MiB, the
 239           1st level page table size is 8192 bytes.
 240
 241         config SHMOBILE_IOMMU_ADDRSIZE_2048MB
 242                 bool "2 GiB"
 243
 244         config SHMOBILE_IOMMU_ADDRSIZE_1024MB
 245                 bool "1 GiB"
 246
 247         config SHMOBILE_IOMMU_ADDRSIZE_512MB
 248                 bool "512 MiB"
 249
 250         config SHMOBILE_IOMMU_ADDRSIZE_256MB
 251                 bool "256 MiB"
 252
 253         config SHMOBILE_IOMMU_ADDRSIZE_128MB
 254                 bool "128 MiB"
 255
 256         config SHMOBILE_IOMMU_ADDRSIZE_64MB
 257                 bool "64 MiB"
 258
 259         config SHMOBILE_IOMMU_ADDRSIZE_32MB
 260                 bool "32 MiB"
 261
 262 endchoice
 263
 264 config SHMOBILE_IOMMU_L1SIZE
 265         int
 266         default 8192 if SHMOBILE_IOMMU_ADDRSIZE_2048MB
 267         default 4096 if SHMOBILE_IOMMU_ADDRSIZE_1024MB
 268         default 2048 if SHMOBILE_IOMMU_ADDRSIZE_512MB
 269         default 1024 if SHMOBILE_IOMMU_ADDRSIZE_256MB
 270         default 512 if SHMOBILE_IOMMU_ADDRSIZE_128MB
 271         default 256 if SHMOBILE_IOMMU_ADDRSIZE_64MB
 272         default 128 if SHMOBILE_IOMMU_ADDRSIZE_32MB
 273
 274 config SPAPR_TCE_IOMMU
 275         bool "sPAPR TCE IOMMU Support"
 276         depends on PPC_POWERNV || PPC_PSERIES
 277         select IOMMU_API
 278         help
 279           Enables bits of IOMMU API required by VFIO. The iommu_ops
 280           is not implemented as it is not necessary for VFIO.
 281
 282 config ARM_SMMU
 283         bool "ARM Ltd. System MMU (SMMU) Support"
 284         depends on ARM64 || (ARM_LPAE && OF)
 285         select IOMMU_API
 286         select ARM_DMA_USE_IOMMU if ARM
 287         help
 288           Support for implementations of the ARM System MMU architecture
 289           versions 1 and 2. The driver supports both v7l and v8l table
 290           formats with 4k and 64k page sizes.
 291
 292           Say Y here if your SoC includes an IOMMU device implementing
 293           the ARM SMMU architecture.
 294
 295 endif # IOMMU_SUPPORT